2012 MacBook Pro
Having trouble connecting to Wi-Fi network.. keep getting a pop window saying a connection time out occurred
Earlier Mac models
Question marked as
Does the MacBook Pro (running which macOS version?) connect to other Wi-Fi networks? All Wi-Fi networks, or just this one?
Troubleshooting: If your Mac isn't connecting to the internet over Wi-Fi - Apple Support
If this is your Wi-Fi: Recommended settings for Wi-Fi routers and access points - Apple Support
I use a paid app called WiFi Explorer to view the current local Wi-Fi network environment; signal strength, drop-outs, competing local Wi-Fi networks; it is a handy tool to have when troubleshooting. It’s in the app store.